Abstract
In communication functional safety, faults are detected by three types of fault detection mechanisms. Among these, it is difficult to obtain an accurate value for DC (Diagnostic Coverage) of CRC. The conventional CRC fault detectability evaluation performs a conservative evaluation that all errors larger than the Hamming distance cannot be detected. However, conservative DC of CRC may not achieve the target value of residual failure probability. Therefore, in this research, Hamming weight is used to evaluate CRC fault detection capability with lower conservativeness than the conventional method. In this evaluation, the proposed method is applied to the CRC arithmetic polynomial of each profile of AUTOSAR E2E. As a result, we were able to improve the failure oversight rate by several digits (nearly 10 digits at maximum).
